Hells Canyon project, Idaho Oregon. Hearings before the subcommittee on Irrigation and Reclamation of the committee on Interior and Insular Affairs, United States Senate, Eighty fifth Congress, first session, on S. 555 a bill to authorize the construction, operation, and maintenance of the Hells Canyon Dam on the Snake River between Idaho and Oregon, and for related purposes, March 6 8, 1957

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